Gearing for double-rotation turbines



K. ALQUIST. GEARING FOR DOUBLEROTATION TURBINES.

APPLICATION FILED JAN. 16. I918.

Patented Aug. 31, 1920.

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4 KARL ALQUIST, 0F SCHENECTADY, NEW YORK.

GEL-RING FOR DOUBLE-ROTATION TURBINES.

Specification of Letters Patent. Pat ug 31 1920 Application filedJanuary is, 1918. Serial No. 212,028.

To all whom it may concern:

Be it known that I, KARL AL ms'r, a subject of the King of Sweden,residing at Schenectady, in the county of Schenectady, State of NewYork, have invented certain new and useful Improvements in Gearing forDouble-Rotation Turbines.

In connection with the use of double rotation turbines; c'. 6., turbineshaving. two rotors which revolve in opposite directions, it is oftendesirable to apply power derived from both rotors through reductiongearing to a single. shaft, and to do this the difiiculty arises thatthe rotation of one of the rotor shafts must be converted into rotationin the opposite direction. It has already been proposed to accomplishthis by means of gearing, the power being transmitted from one rotorshaft through a gearing which includes an idler and from the otherthrough a similar gearing which does not include an idler, thus bringingabout a reversal in the direction of rotation of one of the rotor shaftsrelative to the other.

The object. of my present invention is to provide an improved gearingarrangement for use in connection with double rotation turbines by meansof which the opposite rotation of the two shafts of the rotors may beefiiciently and advantageously converted into rotation in the samedirection so that both rotors may be utilized to drive a common shaft.

For a consideration of what I believe to be novel and my invention,attention is directed to the accompanying specification and the claimsappended t ereto. L

In the drawing, Figure 1 illustrates a gearing arrangement embodying myinvention; Fig. 2 shows a modified arrangement, and Figs. 3 and 4illustrate diagrammatically gearing features common to both Figs. 1 and2.

Referring to Fig. 1, 5 indicates a double rotation turbine having arotor shaft 6 which revolves in one direction, and a rotor shaft 7 whichrevolves in the opposite direction. Elastic fluid is admitted to theturbine by conduits 8. The showing of this turbine is only diagrammaticand it will be understood that it may be of any suitable t pe.

Now, according to my invention, I transmit power from one rotor shaft toa driven shaft which may be a counter-shaft or the main driven shaftthrough a gearing of a type invented by me which comprises a pin ionwhich drives a low speed wheel throu h two flexgble gear wheels whichtransmit 17%16 load in parallel, each flexible gear wheel comprising aplurality of disks or plates fixed at their central portions on a commonsupport and slightly spaced apart at their peripheries so as to permitof slight axial adustment under tooth pressure. Such a gearing isdisclosed in my Patent No. 1,165,830,

dated December 28, 1915. As will be clear the use of such a, gearing inconnectioii with one rotor not only gives me all the I advantages of itas set forth in such patent but serves as well to give such a directioiiof rotat on to the shaft, which it drives as enables 1t to be connectedto the shaft of the other rotor. A gearing of this type is illustrateddlagrammatically in Fig. 3, where 9 1s a pinion which drives the lowspeed wheel 10 through two intermediate flexible gear wheels 11. Thegear wheels 11 transmit the load in parallel and are preferably of the.

type invented byme, as referred to above.

In the arrangement shown in Fig. 1, a gearing as shown in Fig. 3 is usedto transm1t power from the shaft 7 to the counter-. shaft 12 and therespective members of the gearing 1n Fig. 1 have been designated by thenumerals used in Fig. 3. This gives the shaft 12 the same direction ofrotation as that ofshaft 7. The two shafts 12 and Y 6 can then becoupled together in any suitable manner. In Fig. 1 they are shown asbeing geared to a driven shaft 13, here indicated as a propeller shaft,through suitable gearlng which comprises a low speed pinion 14 on shaft12 which meshes with gear wheel 15 on shaft 13, and a pinion 16 on shaft6 which drives gear wheel 15 through h gh speed gear wheel 17 and lowspeed pinion 18 which are carried on shaft 19. As will be clear, thisamounts to a double reduction gearing between the shafts 6 and 7 and thedriven shaft 13. It will also be clear that the counter-shafts 12 and 19rotate in the same direction. In this arrangement the shafts 12 and 19are arranged on opposite sides of the turbine 5. Where the arrangementis intended for ship propulsion, which is one use to which'it is welladapted, a reversing turbine may be provided, as indicated at 20. Fig. 4shows diagrammatically an end view of pinion 16 and gear wheel 17.

In Fig. 2 a modified arrangement is shown rotation turbine 23 drive theshaft 24, here I indicated as being a propeller shaft. The

shaft 21 drives it through a gearing, as shown in Fig. 4, comprisingpinion 25 and gear wheel 26, and the shaft 22 drives it through agearing as shown in Fig. 3 comprising a pinion 27 which drives a gearwheel 28 on shaft 2 1 through two intermediate wheels 29. In this casethe gearing is a single reduction one? 3,0 indicates a reversing turbinewhich may be provided in case the arrangement is used for shippropulsion.

It will be understood that the two arrangements shown are onlyillustrative of arrangements'whichmay embody my invention and thatvarious other arrangements may be used if desired.

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention, together with theapparatus which I now consider What I claim as new and desire to secureby Letters Patent of the United States, is

In combination, a turbine having two rotors which revolve in oppositedirections, shafts for said rotors, a driven shaft, gearing throughwhich said driven shaft is driven by' both rotors, the gearing for onerotor shaft comprising a gear wheel and a pinion meshing directlytherewith, and the gearing for the other rotor shaft comprising apinion, a gear wheel, and two intermediate gear wheels through whichpower is transmitted in parallel from the pinion to said gear wheel, anda reversing turbine-associated with one of the rotor shafts.

In witness whereof, I have hereunto setmy hand this 14th day of January,1918. A

KARL ALQUIST.

